The Hypothalamic-Pituitary-Adrenal (HPA) Axis is the body’s main stress-response system.

Ongoing mental or physiological stress can dysregulate it, affecting every body system and often contributing to unexplained symptoms, various chronic conditions or fertility challenges.

What the HPA axis is ? ‍

Your body has a built-in system that helps you handle stress.

It is called the HPA axis (The Hypothalamic-Pituitary-Adrenal (HPA) Axis).

It involves your brain and adrenal glands working together to release cortisol, a hormone that gives you energy and focus when needed.

How the HPA works?

In a healthy state, this system follows a daily rhythm.

Cortisol is higher in the morning to help you wake up and lower at night so you can rest. It comes in short bursts, not a steady level, and this pattern supports your energy, mood, sleep, sex hormone balance, digestive functions and immune system.

When stress lasts a long time, mental or physiological (inflammation, infections others) the rhythm can get off track.

This is called HPA axis dysregulation. It is not the same as your adrenal glands failing completely.

*Common patterns include too much cortisol at night, a flatter daily curve, or a weaker response to new stress, but patter very from person to person.

Symptoms & Conditions Connected to HPA Axis Dysregulation

This can affect your hormones. It may link to thyroid issues, changes in oestrogen, progesterone or testosterone, or symptoms like fatigue, weight changes around the middle, puffiness irregular periods, or mood shifts, panic attracts.  

For example, ongoing stress can make it harder for your body to balance sex hormones or thyroid function.

The HPA axis often shows dysregulation in conditions such as endometriosis, adenomyosis, PMDD, PMS, PCOS, fibroids, Hashimoto's thyroiditis, hair loss, and chronic gut issues like IBS or SIBO, as well as after past trauma. This can also contribute to fertility challenges.

HPA axis dysregulation can also significantly affect how the body perceives pain (chronic pelvic pain, dysmenorrhea).

You might notice tiredness that does not improve with rest, trouble sleeping, feeling wired at night, or trouble handling daily demands.

These symptoms can overlap with other conditions, so it is important to check with your clinician.

Chronic stress can affect your hormones through the hypothalamic-pituitary-adrenal (HPA) axis, which in turn influences the hypothalamic-pituitary-ovarian (HPO) axis that affects fertility.

How Can We Assess HPA Axis Function? Testing

One helpful way to look at your daily cortisol rhythm is with the DUTCH Plus test. It uses simple dried urine samples collected at several times over a day or two. The test shows your cortisol and cortisone levels throughout the day, plus how your body processes them.

This gives a clearer picture of your stress response pattern than a single blood test.

Your clinician can order it when the results will help guide next steps, such as personalised nutraceuticals, adjusting sleep habits or checking related hormones.

Testing often looks at cortisol at different times of day, usually with saliva samples.

Blood tests check for true adrenal problems or thyroid issues.

One test result does not tell the whole story.

At LITHE HEALTH CLINIC, we prioritise HPA axis resilience as the foundation of care, the whole body health but especially hormonal health.

We tailor interventions, including therapeutic nutraceuticals when appropriate, to the specific type of dysregulation, its stage, and your individual needs.

Support starts with daily-foundational habits that protect your natural rhythm.

Consistent sleep times

Morning light

Regular gentle movement

Simple stress-relief practices like breathing or mindfulness can help.

Treat any related hormone or mood concerns directly with your care team.

This is not a quick fix or a nutraceuticals protocol.

It is about understanding your personal healthy history, and how your stress system connects to the rest of your health and working on the real drivers, like sleep, recovery, and any underlying conditions.

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